config: avoid calling `labs()` on too-large data type

diff --git a/trace2/tr2_cfg.c b/trace2/tr2_cfg.c
index b329921ac5a583567485f03d69dbfa70ab8d680a..caa7f06948ab97c09ee9adf82a9588fcc07d6e52 100644 (file)
--- a/trace2/tr2_cfg.c
+++ b/trace2/tr2_cfg.c
@@ -1,8 +1,7 @@
 #include "cache.h"
 #include "config.h"
-#include "tr2_cfg.h"
-
-#define TR2_ENVVAR_CFG_PARAM "GIT_TR2_CONFIG_PARAMS"
+#include "trace2/tr2_cfg.h"
+#include "trace2/tr2_sysenv.h"
 
 static struct strbuf **tr2_cfg_patterns;
 static int tr2_cfg_count_patterns;
@@ -21,7 +20,7 @@ static int tr2_cfg_load_patterns(void)
                return tr2_cfg_count_patterns;
        tr2_cfg_loaded = 1;
 
-       envvar = getenv(TR2_ENVVAR_CFG_PARAM);
+       envvar = tr2_sysenv_get(TR2_SYSENV_CFG_PARAM);
        if (!envvar || !*envvar)
                return tr2_cfg_count_patterns;